? It is composed of a cabinet, an automatic control system, an air distribution system, an alarm system, and a power distribution system; the cabinet is a cabinet-type upper and lower structure, consisting of an upper positive pressure chamber and a lower sub-chamber. The sub-chamber is equipped with the automatic control system, the alarm system, and the user's inlet and outlet cables; the positive pressure chamber is equipped with some explosion-proof components of the automatic control system and the user's power distribution system components.

? It is welded with Q235 steel plates, and all its joints have undergone special sealing treatment.

? The air intake method is ventilation type, that is, uninterrupted and continuous air supply. The working heat of the components in the positive pressure chamber can be taken away with the air path, which has a good heat dissipation effect.

? Design, manufacture, and inspection are based on GB3836.1-4-2010, GB3836.5-2004 and related standards.

? Under the control of the automatic control system, the power distribution cabinet is introduced with protective gas. The pressure in the positive pressure chamber is higher than the pressure outside the positive pressure chamber, forming a safe micro-positive pressure environment, thereby preventing flammable and dangerous gases from entering the positive pressure chamber and ensuring the safe operation of ordinary instruments and electrical components installed inside.

? The automatic control system mainly completes a series of functions such as automatic ventilation, air replenishment, ultra-high pressure alarm (or exhaust), underpressure alarm, low pressure interlock, ventilation interlock, etc.

? This distribution cabinet has a low pressure interlock function. When the air pressure is lower than the specified value (70Pa), it automatically cuts off the user distribution power supply entering the positive pressure chamber.